The Commodore SS was initially available
in red, with optional white coming some
time later, and both colors therefore
available to HDT iterations

Group One cars feature a "Group One"
decal and "HDT Improved" decal

Group Two cars feature a "Group Two"
decals, curved rear spoiler with four
supports across the boot lid, and black
wind-splitters fitted to the front fenders

Both Group One and Group Two cars could
be optioned with the front bonnet scoop

Group Three cars have "Group Three"
decals, and include rear spoiler
and wind splitters detailed fitted to
Group Two car, with addition of front
air-dam, side skirts, and rear apron
around body extension